A plant is homozygous for flower color. Its flowers are pink.

Question

Which conclusion is best supported by the information?

Flower color is a recessive trait.
Flower color is a dominant trait.
Both parents had an allele for pink flower color.
Only one parent had an allele for pink flower color.

Answer 1

The best-supported conclusion based on the information provided is:

Flower color is a dominant trait.

Since the plant is homozygous for flower color and has pink flowers, this implies that the allele for pink flower color is dominant. If flower color were a recessive trait, the plant would need to carry two recessive alleles to exhibit that trait, which contradicts it having pink flowers. Therefore, it is more likely that pink is a dominant trait.